Parasprite
Animals
Bugs that reproduce asexually by eating. If fed, once they digest the food they will burp out another prasprite. They are very dangerouns as they reproduce extremely fast and are always hungry for more.
About at the begining of Selenara's reign, a new variant appeared in the Everfree Forest, that consumes anything but food. Grifix know not where they came from but after their appearance Selenara had to cast a spell onto the magic barrier in order for it to keep those vermins out. It's a wonder how they haven't yet devoured the entire Forest. Probably there is a predator that keeps their population under control inside the Everfree Forest.
They only live inside the Everfree Forest, but they can spread out into other parts of Equestria by sticking to ponies they meet along the way.